Melting point :-87 °C (lit.)
Boiling point :80 °C (lit.)
Density :0.805 g/mL at 25 °C (lit.)
vapor density :2.49 (vs air)
vapor pressure :71 mm Hg ( 20 °C)
refractive index :n20/D 1.379(lit.)
FEMA :2170 | 2-BUTANONE
Flash point :26 °F
storage temp. :2-8°C
solubility :Miscible with acetone, ethanol, benzene, ether (U.S. EPA, 1985), and many other solvents, particularly ketones and aldehydes
pka :14.7 (quoted, Riddick et al., 1986)
form :Solution
color :Colorless
Relative polarity :0.327
Odor :Sweet/sharp odor detectable at 2 to 85 ppm (mean = 16 ppm)
PH :pH(1+4, 25℃):6.0～7.0
explosive limit :1.8-11.5%(V)
Odor Threshold :0.44ppm
Odor Type :ethereal
Water Solubility :290 g/L (20 ºC)
Merck :14,6072
JECFA Number :278
BRN :741880
Henry's Law Constant :23.0 at 50.00 °C, 34.1 at 60.00 °C, 50.6 at 70.00 °C, 70.4 at 80.00 °C (headspace-GC, Hovorka et al., 2002)
Exposure limits :TLV-TWA, PEL 590 mg/m³ (200 ppm) (ACGIH, OSHA); STEL 885 mg/m³ (300 ppm) (ACGIH); IDLH 3000 ppm (NIOSH).
Dielectric constant :18.5（20℃）
Stability :Stable. Highly flammable. Incompatible with oxidizing agents, bases, strong reducing agents. Protect from moisture.
LogP :0.3 at 40℃
CAS DataBase Reference :78-93-3(CAS DataBase Reference)
NIST Chemistry Reference :2-Butanone(78-93-3)
EPA Substance Registry System :Methyl ethyl ketone (78-93-3)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.